Ah totally stumped! any suggestions on what this deficiency is please help

[newbiegrower4]

all from the same plant,ive checked all my books and it has me stumped

 

[crazy horse]

Nute/Water splash or general over-feeding??

 

[Goldengoose7]

Hard to indentify in that YELLOW light! Can you move the plant out into natural light and take some additional photos?

Could possibly be a magnesium difficiency, but again, can't be sure without seeing plant in natural light.

 

[N.W.Green]

i would agree with a little bit of over nute, but more likely its a Ph problem where has your bucket been sitting Ph wise and how much drift have you been seeing lately?